PSLE
Lucy had rubber duckies for sale. In the morning, she sold ¹₄ of the rubber duckies. In the afternoon, she sold ⁵₉ of the remaining rubber duckies. After that, there were 60 rubber duckies left. How many rubber duckies did Lucy have at first?
Fraction of rubber duckies left after selling in the morning
= 1 - ¹₄
= ³₄

Fraction of the remaining rubber duckies after selling in the afternoon
= 1 - ⁵₉
= ⁴₉

⁴₉ of remaining rubber duckies = 60
¹₉ of remaining rubber duckies = 60 ÷ 4 = 15
⁹₉ of remaining rubber duckies = 9 x 15 = 135

³₄ of total rubber duckies = 135
¹₄ of the total rubber duckies = 135 ÷ 3 = 45
⁴₄ of the total rubber duckies = 4 x 45 = 180

Number of rubber duckies at first = 180

Answer(s): 180